Patent DE849938C successfully refreshed from Google Patents.
Patent US4741251A successfully refreshed from Google Patents.
US4741251A
Expired / Lapsed
US
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Swashplate assembly for a swashplate type hydraulic pressure device
Assignee: Honda Motor Co Ltd
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Filing: 1986-05-28
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Granted: 1988-05-03
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Expires: 2006-05-28
Abstract
Abstract A swashplate type hydraulic pressure device comprising a cylinder and a swashplate which is rotatable relative to the cylinder and rotatably supported on a holder, the cylinder having a number of plungers disposed thereon axially slidably in an annular arrangement, in which a spherical end is formed at that extreme end of each plunger which is in abutment with the swashplate, and the swashplate is provided with a spherical concave portion for engagement with the spherical end. By cooperation between the spherical concave portions and the ends, the cylinder rotates synchronously with the swashplate and an aligning action is imparted to the swashplate from the group of plungers of the cylinder.
Inventors
- 👤 Tsutomu Hayashi
- 👤 Mitsuru Saito
- 👤 Yoshihiro Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:17
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/42; F16H61/423; F01; F01B; F01B3/00; F01B3/0032; F01B3/0044; F01B3/007; F04; F04B; F04B1/00; F04B1/12; F04B1/122; F04B1/124; F04B1/14; F04B1/141; F04B1/146; F16H39/00; F16H39/04; F16H39/06; F16H39/08; F16H39/10; F16H39/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
276 words
A swashplate type hydraulic pressure device comprising: a cylinder having an axis; a number of plungers axially slidably disposed in a number of cylinder bores which are arranged in said cylinder annularly around the axis thereof; a swashplate holder disposed opposedly to the tip ends of said plungers; and a swashplate rotatably supported on said swashplate holder and having a number of spherical concave portions formed on a surface thereof to be abutted by spherical ends which are formed at the tip ends of the plungers; wherein said spherical concave portions are each formed to have a radius of curvature larger than that of the associated spherical end of the plunger and a center point of engagement between the spherical concave portion and the associated spherical end of the plunger is displaceable in an inclined state of the swashplate, in response to sliding motion of the plunger in said cylinder bore, between a radially outer side position at which said center point of engagement is located radially outer than an axis of the plunger with respect to the cylinder axis and a radially inner side position at which said center point is located radially inner than said axis of the plunger with respect to the cylinder axis; and wherein radial forces acting on said swashplate at respective center points of engagement between the spherical concave portions and the spherical ends of the plungers are directed such that the radial forces appearing in the spherical concave portions located on a substantially same diametrical line on the swashplate work to offset each other regardless of the angle of inclination of the swashplate so as to center said swashplate.
Claim 2
Dependent Claim
276 words
A swashplate type hydraulic pressure device comprising: a cylinder having an axis; a number of plungers axially slidably disposed in a number of cylinder bores which are arranged in said cylinder annularly around the axis thereof; a swashplate holder disposed opposedly to the tip ends of said plungers; and a swashplate rotatably supported on said swashplate holder and having a number of spherical concave portions formed on a surface thereof to be abutted by spherical ends which are formed at the tip ends of the plungers; wherein said spherical concave portions are each formed to have a radius of curvature larger than that of the associated spherical end of the plunger and a center point of engagement between the spherical concave portion and the associated spherical end of the plunger is displaceable in an inclined state of the swashplate, in response to sliding motion of the plunger in said cylinder bore, between a radially outer side position at which said center point of engagement is located radially outer than an axis of the plunger with respect to the cylinder axis and a radially inner side position at which said center point is located radially inner than said axis of the plunger with respect to the cylinder axis; and wherein radial forces acting on said swashplate at respective center points of engagement between the spherical concave portions and the spherical ends of the plungers are directed such that the radial forces appearing in the spherical concave portions located on a substantially same diametrical line on the swashplate work to offset each other regardless of the angle of inclination of the swashplate so as to center said swashplate.
Claim 3
Dependent Claim
54 words
The device according to claim 1 wherein when said plunger is at a limit point of sliding stroke, said center point of engagement can assume said radially outer side position whereas when said plunger is at an intermediate point of sliding stroke, said center point of engagement can assume said radially inner side position.
Claim 4
Dependent Claim
40 words
The device according to claim 1 wherein a distance between a center of the spherical concave portion and an axis of said swashplate is set larger than that between the axis of the plunger and the axis of the cylinder.
Claim 5
Dependent Claim
37 words
The device according to claim 1 wherein said cylinder has a side face, which is opposed to said swashplate, formed inclined with respect to the axis of the cylinder so as to be tapered toward the swashplate.
Claim 6
Dependent Claim
20 words
The device according to claim 8 wherein said cylinder bores are opened at said inclined side face of the cylinder.
References Cited (Backward Citations)
DE317649C
Cited
US24317A
Cited
FR791714A
Cited
AT143921B
Cited
GB535555A
Cited
US2395980A
Cited
GB574991A
Cited
US2388462A
Cited
US2662375A
Cited
US2984070A
Cited
US2683421A
Cited
US2651386A
Cited
DE880989C
Cited
US2844002A
Cited
US2907230A
Cited
GB835936A
Cited
DE1200135B
Cited
GB902978A
Cited
US3054263A
Cited
US3274947A
Cited
US3036434A
Cited
AT240661B
Cited
US3175363A
Cited
US3187868A
Cited
GB1021873A
Cited
US3131539A
Cited
US3133418A
Cited
US3143858A
Cited
US3165892A
Cited
US3170297A
Cited
DE1480553A1
Cited
US3213619A
Cited
US3313108A
Cited
DE1500480A1
Cited
DE1625039A1
Cited
US3382813A
Cited
US3416312A
Cited
CH473997A
Cited
GB1282094A
Cited
US3543514A
Cited
GB1222200A
Cited
US3620130A
Cited
US3698189A
Cited
US3834164A
Cited
US4170279A
Cited
US4080992A
Cited
JPS56143856A
Cited
JPS5770968A
Cited
GB2104976A
Cited
DE3139191A1
Cited
JPS5938467A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-03 | 1991-11-02 | 1992-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-03 | 1995-11-02 | 1996-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-03 | 1999-11-02 | 2000-05-03 | $7700.00 | Window Closed / Lapsed |